<form action="${uploadUrl}" method="post" enctype="multipart/form-data">
  <input type="hidden" name="keywordId" id="keywordId" value="${keywordId}">
  <input type="hidden" name="account" id="account" value="${account}">
  <p>选择文件:<input type="file" name="file"></p>
  <p><input type="submit" value="提交"></p>
</form>
